docs: def get(self, request, uri):
          """
          Return published node or specified version.
  
          JSON Response:
              {uri: x, content: y}
          """
          uri = self.decode_uri(uri)
          node = cio.get(uri, lazy=False)
  
          if node.content is None:
              raise Http404
  
          return self.render_to_json({
              'uri': node.uri,
              'content': node.content
          })